8 valence electrons are needed for an element to become stable, which is why the noble gases do not interact with any other elements. They are already stable. However, the exception is Helium, the first noble gas, which only has two valence electrons. 8 valence electrons are needed on the 2nd and 3rd valence shells for any molecule to become stable.
Most elements need 8 electrons in their valence shells.
It needs eight.
you would need a full outer shell so 8
it needs 8 :)
Eight
8
Elements are in fact a bundle of energy if you will. I believe what your asking is How can you tell if an element will conduct electricity. If an atom contains less the the required atoms for its outer shell to become full and stable, it is classified as a conductor. Here's why: The atoms of a given element is composed of the protons, neutrons, and electrons. Electrons are the "electricity" part of an atom. These electrons orbit the protons and neutrons that are at the center of the atom. The electrons are in Valence shells, which is basically which orbit the electrons are on, the closest shell/orbit can contain only 2 electrons, and then it is said to be stable and full; the second valence shell/orbit can only contain 8 electrons, and then it is said to be stable and full; the third valence shell/orbit can only contain 8 electrons, and then it is said to be stable and full also ect.... Now, if we took the third valence shell, and it only contained 1 electron, it is NOT stable and full, so this 1 electron/electricity-part-of-the-atom is free to float around to other empty shells. This is due to the fact that the electrons always want to be in a stable shell/orbit. Some atoms of certain elements naturally contain a full AND therefore stable outer valence shell, (the furthest shell/orbit away.) If an atom contains less the the required atoms for its outer shell to become full and stable, it is classified as a conductor.
It is very stable #APEX :P
an ion.
Boron, Krypton,Neon, and Radon Krypton, Neon and Radon do not gain electrons. Because an atom wants to have eight electrons in their valence shell or their outermost shell, and Krypto, Neon and Radon are Noble Gases which already have eight in their valence shells, so they don't lose or gain electrons. And as for Boron it want's to gain 5 electrons because it only has three in its valence shell.
Electrons are arranged in electron clouds around the nucleus. The reactivity is determined by the number of valence electrons, or electrons in the outermost energy levels. All atoms (except for hydrogen who wants 2 electrons and boron who wants 6) want 8 valence electrons, or a full outer energy level. This makes them stable (like the noble gases). If an atom has 1 valence electron it will desperately want to lose that electron while an atom with 7 electrons will want to gain one electron. All atoms have the goal of 8 valence electrons. Also, the 1st energy level only has 2 electrons. After that there is 8 electrons (approximately, because you can never truly determine where an electron is inside of an atom at any given time).
they want to become stable by having all of the valence filled they want to become stable by having all of the valence filled
An atom requires 8 valence electrons to be chemically stable. The elements with 8 valence electrons are the Noble Gases, and they are both stable and largely unreactive.
Elements get stable only when it completes electron octate in its outermost orbit. Elements make compounds with other elements to gain or reduce electrons to get stability. silicon make bonds with oxygen and make silicon dioxide to get stable.
When the atom has 8 valence electrons.
Elements in group two become more stable as they all have complete electron shell.They do not have valence electrons and hence they are less reactive.Some of the elements of group 2 are Barium,Magnesium and Calcium
Silver Nitrate is a compound. A compound is formed in such a way that its constituent elements share or transfer electrons in order to become stable. So, the valencies are complete. A compound is stable. Only elements have valence electrons.
Most elements need 8 electrons in their valence shells.
Except for elements 1 and 2, all elements are stable with how many electrons in their outermost (valence) level?
8 valence electrons are there in in neon's family .They are stable in nature.
In the short form: elements are striving to completely fill valence shells of electrons to reach a quantumly stable energy state. They react to take electrons away from elements willing to give up electrons or share outer shell electrons with elements they aren't strong enough to steal from.
For an element to be stable, it must have a full outer shell (valence shell) of electrons. An element with a full outer shell of electrons will act like its nearest noble gas and be stable. Most elements require 8 valence electrons to be stable, however H needs 2.
The noble gases is the most stable group of elements. They have their outer electron energy levels full, but the number of electrons vary according to which noble gas it is. They are group 18 on the periodic table.